Raising children with ADD spouse

This is my first time posting, but I have been visiting this site for about a year.  My husband stopped taking his ADD medicine several months ago.  He also has sleep apnea and won't use his equipment at night.  According to him, both these things are my fault.  He also tells me I'm the reason he lies.  Things have been horrible lately, especially when it comes to our kids.  They don't see his constant lies and I'm the "mean and bad" parent because I ask them to do chores.  In front of me, he tells both kids (11 and 14) that they don't need to do what I ask and that I should do it myself.  Last night was the second time my daughter has accused me of stealing cash from her purse.  She told me she's missing $10 and wanted to know where it is.  When I ask my husband to tell her that of course I didn't steal her money, he tells our daughter that he doesn't know if I am the thief.  The thing is, my husband will take cash from me without saying anything.  I am guessing he needed cash and "borrowed" it from her and is blaming me.  Our house is so full of tension and I don't think I can live here much longer.  I spend evenings alone in my bedroom while husband and kids watch tv downstairs.  I thought i could stick it out until our youngest graduates from high school, but the situation with my kids is breaking my heart.  I've asked for a divorce but he says he'll spend every penny we have fighting me and that the kids will want to live with him.  I know that is true--he's the fun parent and I'm the one that takes care of everything else.